and nuke myorigin too.

livecd.sh

@@ -205,7 +205,7 @@ deb-src http://security.ubuntu.com/ubuntu ${STE}-security main restricted
     rm -f ${ROOT}var/spool/postfix/maildrop/*
     chroot $ROOT apt-get update || true	# give them fresh lists, but don't fail
     rm ${ROOT}etc/resolv.conf ${ROOT}etc/mailname
-    sed -i '/^myhostname/d; /^mydestination/d' ${ROOT}etc/postfix/main.cf
+    sed -i '/^myhostname/d; /^mydestination/d; /^myorigin/d' ${ROOT}etc/postfix/main.cf
     echo set postfix/destinations | chroot ${ROOT}/usr/bin/debconf-communicate postfix
     echo set postfix/mailname | chroot ${ROOT}/usr/bin/debconf-communicate postfix
     chroot ${ROOT} dpkg-query -W --showformat='${Package} ${Version}\n' > livecd.${FS}.manifest